Dog shampoo for human allergies?

My boyfriend and me both have dog allergies and my mother bought me a dog for a very early B-Day present and I usually don't have problems with animals that much from living around them since I was born. The first day of having the dog at my apt. I got hives on my hands for the first time and kept sneezing. I think one problem was the flea shampoo I used on her since her skin got flakey. I was wanting to know if anyone has used dog shampoo that is suppose to help reduce allergies and if it works?